<template>
  <el-container class="home-container">
    <!-- 头部区域 -->
    <el-header>
      <div>
        <img src="../assets/heima.png" alt="">
        <span>电商后台管理系统</span>
      </div>
      <el-button type="info" @click="loginout">退出</el-button>
    </el-header>
    <!-- 页面主体区域 -->
    <el-container>
      <!-- 侧边栏 -->
      <el-aside :width="isCollapse ? '64px': '200px'">
        <div class="toggle-button" @click="toggleCollapse">|||</div>
        <el-menu background-color="#333744" text-color="#fff" active-text-color="skyblue"  :collapse-transition="false" unique-opened :collapse="isCollapse" router :default-active="activePath">
          <!-- 一级菜单 -->
          <el-submenu :index="String(item.id)" v-for="item in menulist" :key="item.id">
            <!-- 一级菜单的模板区域 -->
            <template slot="title">
              <i :class="iconsObj[item.id]"></i>
              <span>{{item.authName}}</span>
            </template>
            <!-- 二级菜单 -->
              <el-menu-item :index="'/'+subItem.path" v-for="subItem in item.children" :key="subItem.id" @click="saveNavState('/'+subItem.path)">
              <template slot="title">
              <i class="el-icon-menu"></i>
              <span>{{subItem.authName}}</span>
            </template>
              </el-menu-item>
          </el-submenu>
        </el-menu>
      </el-aside>
      <!-- 右侧内容主体 -->
      <el-main>
        <router-view>
        </router-view>
      </el-main>
    </el-container>
  </el-container>
</template>

<script>
export default {
  data(){
    return {
      menulist:[],
      iconsObj:{
        '125':'iconfont icon-user',
        '103':'iconfont icon-tijikongjian',
        '101':'iconfont icon-shangpin',
        '102':'iconfont icon-danju',
        '145':'iconfont icon-baobiao'
      },
      isCollapse:false,
      //被激活的额链接地址
      activePath:''
    }
  },
  created(){
    this.getMenuList(),
    this.activePath=sessionStorage.getItem('activePath')
  },
  name: 'Home',
  methods: {
    loginout() {
      sessionStorage.clear()
      this.$router.push('/login')
    },
    async getMenuList() {
    const{data:res} =await this.$http.get('menus')
    console.log(res);
    if(res.meta.status!==200) return this.$message.error(res.meta.msg)
    this.menulist=res.data
    },
    //点击按钮切换菜单折叠与展开
    toggleCollapse(){
      this.isCollapse=!this.isCollapse
    },
    saveNavState(activePath){
      //保存链接的激活状态 的index
    sessionStorage.setItem('activePath',activePath)
    this.activePath=activePath
    }
  },
}
</script>

<style lang="less" scoped>
.home-container {
  height: 100%;
}
.el-header {
  align-items: center;
  background-color: #373d41;
  display: flex;
  justify-content: space-between;
  padding-left: 0;
  color: #fff;
  font-size: 20px;
  div {
    display: flex;
    align-items: center;
    span {
      margin-left: 15px;
    }
  }
}
.el-aside {
  background-color: #333744;
  .el-menu{
  border: 0;
}
}
.el-main {
  background-color: #eaedf1;
}
.iconfont{
  margin-right: 10px;
}
.toggle-button{
  background-color: #4a5064;
  color: white;
  font-size: 10px;
  text-align: center;
  line-height: 24px;
  letter-spacing: 1px;
  cursor: pointer;
}
</style>